Apparatus for cutting girders.



PATENTED JUNE 19, 1906.

H. JOHN. APPARATUS FOR CUTTING GIRDERS.

APPLIOATION, FILED SEPT.11,1905.

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No. 823,871. PATENTED JUNE 19, 1906.

H. JOHN.

APPARATUS FOR CUTTING GIRDERS.

AIPLIOATION FILED SEPT.11, 1905.

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PATENTED JUNE 19, 1906. H. JOHN. APPARATUS FOR CUTTING GIRDERS.

APPLICATION FILED SEPT.11,1906.

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UNITED. STATES iAT NT OF 1 HUGO JOHN, or I yER'soEHoFEN, NEAR ERFURT, GERMANY.

APPAFIATUS F OR CUTTING GIRDERS.

Specification of Letters Patent.

Patented June 19, 1906.

To all whom it may concern:

Be it known that I, HUGO Jo'nN, manufacturer, a subject of the King of Prussia, German Em eror, residing at 1 SChwerbornerstrasse, IIversgehofen, near Erfurt, Germany, have invented certain new and useful Improvements in Apparatus for Cutting Girders, of which the following is a specification.

This invention relates to an apparatus for cutting girders, and especially I-girders, and differs from well-known apparatus of this character in that the girder when its two .ends and two flanges are being cut need not be turned through an angle of one hundred parts being illustrated in dotted lines.

and eighty degrees or ninety degrees, and, furthermore, the apparatus need not be moved. By this means considerable time and labor are saved in cutting girders, especi ally in the latter devices having great length. By turning a girder through an angle of one hundred and eighty degrees it is intended to be understood the manipulation of the girder in its longitudinal direction in such manner that, for instance, its former right-hand end becomes, after the turning, the left-hand end. In the same manner turning a girder through an angle of ninety degrees it is to be-understood as turning the girder in its longitudinal direction, so that its two ends in the new position are shifted at a right angle relatively to the former position. This object is attained by an apparatus which will be more fully hereinafter set forth and having three upper and three corresponding lower cutters of a specific arrangement.

In the drawings, Figure 1 is a sectional ele' vation showing the position of the cutters with respect to the girders operated uppn,

1g. 2 is a top plan view. Fig. 3 is a sectional end elevation. Fig. 4 is a detail perspective view of a portion of a girder, showing the manner of cutting the same, the removed parts being illustrated in dotted lines. Figs. 5 to 22, inclusive, illustrate different positions andsections of the girder during the cutting operation and as a result of the latter.

Similar characters of reference are employed to indicate corresponding parts in the views.

The two upper cutters c and d and the corresponding bottom cutters c and d are U- shaped and arranged in the apparatus in such manner that they are superposed with their front and back branches or arms in corresponding positions, a third straight cutter e,

tively, between the upper cutters c and d and lower cutters c and The arrangement of the cutters is particularly shown by Figs. 1 and 3, and the apparatus includes a fixed holder a for the bottom tools and a movable holder b'for the upper tools. These holders have narrow or top ends which carry the U shaped cutters c and d and c and d, and on one of the longitudinal sides of each holder is arranged the straight cutters e and c The movable holder 1) for the upper tools is reciprocated by any suitable means toward the holder a for the bottom tools or cutters, the means employed for this operation being either manual or by power and may be either by pressure delivered from the top or by a pull from the bottom.

The operation of the apparatus is illustrated in Figs. 3 to ,17 and is as follows: For

instance, consider the I-girder shown in ele-' vation and cross-section by Fig. 5, the crosssections being indicated by m and y. The

ends to be cut off or sheared off are marked 1,

2, 3, and 4.

Figs. 6 to 17 show the position of theI-section girderduring the various steps of the cutting at both ends of the girder, Figs. 6 to 11 illustrating the cutting at the :1: end and Figs. 12 to 17 at the y end. These figures also show the positions of the girder relatively to the cutting apparatus and the-working of the corresponding cutters, the several views being diagrammatic in their arrangement.

Figs. 6 to 9 show the cutting of the flange portions 1, 2, 3, and 4 by means of the cut- 'ters d and cl, which operate as shown by Fig. .3. During these four cutting operations the girder is at first standing twice in the position shown in full lines in Fig. 3 on the left-hand side, and then twice in the'position shown in dotted lines on the right-hand side of the same figure. The cutting of the end w is effected in the following sequence. The righthand U-shaped cutters d and d (see Fig. 6) cut with their front arms and the web the bottom back flange 2. (See also Fig. 2.) In Fig. 7 the same cutters d and d cut with their back arms and the web the front bottom flange 1. The girder is then rotated through an angle of one hundred and eighty degrees Ioo IIO

that is to say, moved about its longitudinal ii axis in such manner that the flange which was at the top now comes to the bottom. (See Fig. 18.) In Fig. 8 the same right-hand U-shaped cutters d and d cut with their back arms and the web, as in Fig. 7, the front flange 4 at the as end of the girder, which is now situated at the bottom. In Fig. 9 the cutters d and'd finally cut with their front arms and the web back flange 3 at the as end of the girder and now also situated at the bottom. The girder is then rotated through an angle of ninety degrees (see Fig. 20) and is pushed by the cutters cl and d to the flat cutters e and 6. These flat cutters operate to cut the web ortions 3 4 ac and 1 2 x, which have been 1e t between the two out flanges. In Fig. 10 the cutters e and 6 cut the web portions 3 4 00. Then the girder is rotated again through an angle of one hundred and eighty degrees. (See Fig. 21.) In Fig. 11 the same girders e and 6 cut the web portions 1 2 x. In this way one end, :20, of the girder has been completely cut and the same opera tions are repeated for the girder end y. In pursuing the operation with respect to the end y the girder is shifted in a longitudinal direction or so dis osed until its y end comes level with the U aped cutters c and c. As shown by Fig. 12, the U-shaped cutters c and c first cut with their front arms and the web the bottomback flange 2 y. In Fig. 13 the U- shaped cutters c and 0 cut with their back arms and the web the bottom front flange 1 y, and at the conclusion of the latter cutting operation the girder is then rotated through an angle of one hundred and eighty degrees. (See Fig. 13.) In Fig. 14 the U-shaped girders c and 0 cut with their back arms and the web the front flange 4 g, which is now situated at the bottom. In Fig. 15 the U-shaped cutters c and 0 cut with their front arms and the Web the bottom back flange 3 y. The girder is then rotated through an angle of ninety degrees, Fig. 20, and again brought within the reach of the cutters e and e. In Fig. 16 the cutters e and e cut the remaining web poris claimed istion 3 4 y. The girder is then again rotated through an angle of one hundred and eighty degrees, Fig. 21. In Fig. 17 the cutters c 0 cut the remaining web portions 1 2 y, and by this means the girder end is completely cut. The cut girder end as is shown in Fig. 4 in perspective, and the same figure also shows the cut flange and web portions. Fig. 22 illustrates the movement of the beam operated upon to turn it through an arc of ninety degrees in a horizontal plane to show the position of the girder during the cutting operation. This turning of the girder brings the ends Z and r at a right angle relatively to the former positions occupied by said ends, and demonstrates the edge of the cutters heretofore set forth in operating upon a girder without requiring a complete overturn of the same during certain cutting operations. The apparatus described therefore enables a girder to be cut at both ends without having to turn it and without having to turn the apparatus with its driving and other cooperating parts.

Having thus described the invention, what 1. An apparatus of the class set forth, embodying two pairs of cutters of U shape arranged in upper and lower relation, the upper cutters being driven and the lower cutters fixed, and upper and lower straight cutters between the said U-shaped cutters and parallel to the arms of the latter. 2. An apparatus for cutting I section girders characterized by an upper pair of driven cutters, a lower pair of fixed cutters, the cutters being of U shape and similarly arranged to cooperate with each other, and upper and lower straight cutters.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

HUGO JOHN.

Witnesses PAUL TEIGHMANN, ERNST EBERHARDT. 

